I'm just updating my status on this quilt.
I've made several stabs at calculating block sizes and got some blocks and sashing pieces cut. I always fall in love with panels, but trying to cut them to a usable size and square is tedious at best. After some frustrating attempts at sewing sashing to the blocks (my machine wasn't sewing properly and will go to the shop), I ended up frogging and deciding to cut the blocks just a tad smaller.
I'm determined, though, and will persevere.